Can you look into seeing a physiatrist (a specialist in physical medicine and rehabilitation)? They can look into issues like these to determine what may be causing them. Mine was also the most helpful in terms of providing resources for cognitive rehab for my concussion.

You can find doctors here: http://www.aapmr.org/patients/findph...s/default.aspx
but my doctor is not included in this listing (and she is AWESOME) so there may be others in your area that are not on this list. You might be able to find those by asking for a referral.